Brattstrom, 25, appeared in 35 games between the American Hockey League's Grand Rapids Griffins and ECHL's Toledo Walleye during the 2021-22 campaign, which was his first in North America. In 32 games with Grand Rapids, he owned a 11-16-3 record with a 3.32 goals-against average, 0.894 save percentage and one shutout, while posting a 2-1-0 mark with a 4.29 goals-against average and 0.829 save percentage in three appearances with Toledo. Brattstrom was also recalled to Detroit's active roster for the first time in his career on March 29 and backed-up Red Wings netminder Alex Nedeljkovic against the New York Rangers on March 30. Originally selected by the Red Wings in the sixth round (160th overall) of the 2018 NHL Entry Draft, Brattstrom spent the 2020-21 campaign with KooKoo in the SM-Liiga, Finland's top professional league, where he ranked as one of the league's top netminders by posting a 2.20 goals-against average and 0.903 save percentage, alongside an 18-12-7 record and one shutout.
The 6-foot-4, 200-pound goaltender also logged three professional seasons in Sweden for Timra IK, in both the Swedish Hockey League and second-tier Allsvenskan. Brattstrom compiled a 5-14-0 record, 2.81 goals-against average and 0.897 save percentage in 23 SHL games and a 43-17-0 record, 2.08 goals-against average, 0.915 save percentage and six shutouts in 60 second-tier games between 2017-19. The Gothenburg, Sweden, native spent four seasons with Frolunda HC's junior clubs prior to joining Timra, posting the top save percentage in the under-18 league in the 2013-14 campaign (0.930). He also led the Swedish junior league in save percentage (0.935) with Timra's under-20 team in 2016-17.
